FT821AA

Overview

The FT821AA is a Power Factor Correction (PFC) controller manufactured by Fremont Micro Devices Ltd. It operates in discontinuous conduction mode (DCM) transition mode to enhance efficiency across varying load conditions. The device supports universal AC input voltages ranging from 85V to 265VAC. It is housed in an 8-SOP surface-mount package with a width of 3.90mm. The component functions within a temperature range of -40°C to 125°C and features a low startup current of 50 µA.

Feature Summary

• Implements discontinuous conduction mode transition control for optimized power factor correction
• Designed for universal AC input voltage operation without external transformer requirements
• Utilizes an 8-pin small outline package suitable for compact surface mount applications

Applications

• Universal input offline power supplies
• Adapters and chargers requiring high power factor
• Consumer electronics power management circuits

Procurement Notes

Verify the specific suffix and packaging configuration against the manufacturer's latest documentation, as availability may vary due to product lifecycle status. Confirm that the 8-SOP footprint matches your PCB design constraints. Ensure compliance with environmental regulations such as REACH and check for any alternative components if this part is discontinued.

Selection Notes

Select this component when designing systems requiring DCM transition mode PFC control for wide input voltage ranges. Consider the 8-SOP package size for space-constrained layouts. Evaluate the thermal performance within the specified operating temperature range. Verify compatibility with the target switching frequency and inductor design parameters defined in the official datasheet.

Part Context

The FT821AA belongs to the FT821 family of PFC controllers produced by Fremont Micro Devices Ltd. This series focuses on providing efficient power factor correction solutions for offline applications. The device integrates necessary control logic to manage the boost converter stage, aiming to meet regulatory standards for harmonic distortion in power consumption.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer or authorized distributors for current obsolescence notices and recommended alternatives.